Solder gun



FIG. 1 is a right side elevational view of a solder gun showing my new design, the left side being a mirror image thereof;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for solder gun, as shown and described. 